Valve-grinder.



A. BTGOMBS.

VALVE GRINDER.

APPLICATION FILED JAN.16, 191M Patented Jan. 27, 19M

'second, to provide,

UNITED STATES PA ENT OFFICE.

ALBURT B. COMBS, OF PORTLAND, OREGON, ASSIGNOR OF FIFTY-FIVE-ONEHUNDREDTHS TO H. L. KEATS, OF PORTLAND, OREGON.

VALVE-GRINDER.

To all whom it may concern Be it known that I, ALBURT B. Comes, a

citizen of the United States, residing in the city of Portland, countyof Multnomah, and State of Oregon, have-invented certain new and usefulImprovements in Valve-Grinders,

to develop a rapid rotary oscillating move ment which can be applied andmade use of for grinding, drilling, polishing, agitating, or for anyother purpose where a rotary movement back and forth is desired.

The principal objects of my invention are: first, to provide a powerdriven mechanism in which a reciprocating movement is utilized todevelop a rapid rotary oscillating movement, and by this expression Imean a rotary movement back and forth for any part of a completerotation, or for more than a complete rotation, and return; as onegeneral embodiment of the invention, mechanisms of the characterreferred to in which the actuating or motive power is a fluid underpressure; third, to provide improvements in the construction andarrangement of parts whereby the operation of the actuated mechanism ismade more perfect. 1

Other objects of the invention will appear as one embodiment thereof isillustrated and described.

I am aware thatthe invention can be embodied and made use of in avariety of different mechanisms, and that air under pressure, steam, gasor other fluids can be successfully used to operate same, and I do nottherefore, limit the'invention to the particular embodiment which I haveshown in the drawings for the purpose of illustrating and moreparticularly describing the invention.

In the accompanying drawings I have {shown-the invention embodied in adevice particularly adapted for grinding valve seats, and in which anactuated member is placed upon a puppet valve, for example, shown indotteddines, for the purpose of turning said valve member back and forthupon its seat and grinding the meeting surfaces until a perfect contactor seat is had.

I will now describe thisembodiment of Specification of Letters Patent.Application filed January 16, 1911.

Patented Jan. 27, 1914. Serial No. 602,960.

the invention as illustrated in the drawings, in which,-

Figure l is a side elevation of one em bodiment of the invention, partlyin vertical section; Fig. 2 is a similar viewfrom another point of Viewandwith parts broken away to reduce the size of the finger; and Fig. 3is a top plan view of Fig. 2.

Referring now to the drawings, 1 designates a casing having therein alongitudinally extending cylinder 2, a valve chamber 3 with exhaust port3, and a guideway 4. Within the cylinder 2 works a piston 5, upon apiston rod 6. The piston rod 6 is hollow, and the piston 5 is providedwith a central opening registering with'the rod, whereby said piston androd work over a rotatable spiral member 7, suitably mounted, andcarrying at its lower end a receiving or holding chuck, or member, as 8.Said spiral member 7 is provided with a spiral groove,

as indicated, which in the present showing represents a half turn orless. It is to be understood that such portion of a complete turn may beused as is most satisfactory for the work to be done. It has been foundthat a quarter turn is well adapted to valve grinding of the characterreferred to. In the opening through the center of the piston 5, and atthe opposite sides are two small, inwardly projecting lugs or members,indicated in dotted lines, which fit within the spiral groove of themember 7, and impart thereto a rotary oscillating movement as saidpiston reciprocates within said cylinder 2. Opening into opposite endsof the cylinder two ports, as 9 and 10, adapted to be opened and closedby means of a long valve member, as 11, made hollow for the purpose ofproviding an exhaust passage from the upper end of the cylinder. Saidvalve member 11 is reduced in its diameter for the greater part of itslength in order to provide space therearound for the admission of afluid under pressure, as at 12. The ends of said valve member 11 areconstructed so as to cover and close, alternately the entrance ports 9and 10 as said valve thereto, as by a rivet or ,pin 14, said rod bemgprovided at its upper end with actuab.

ing mechanism comprising a fixed collar, as 15, a shifting collar orsleeve, as 16, and a nut 17.

18 designates a small, spring actuated, friction device for preventingsaid valve member from moving too freely or dropping down at thewrongtime.

19 designates a handle stem secured to the casingl. Mounted thereto,just above the casing 1, is a rock shaft, as 20, with a crank arm 21,adapted to be actuated by a spring and rod mechanism, as 22. At theopposite end of said rock shaft 20, is another crank arm 23, standing atsubstantially right angles to the arm 21, and the end of which isconnected through a link 24 to the shift collar or sleeve 16 upon thevalve rod 13. This mechanism operates to give a quick and completestroke to the valve 11 at the end of each stroke of the piston head,whereby to fully open and close, alternately, the entrance ports intothe piston cylinder.

25 designates a combination valve actuating member and guide rod,connected at its upper endto the upper end of the piston rod 6, and atits lower end working in the guideway 4, in the casing 1. Said member orrod is cut away at one side, as indicat vide camshoulders 26 and 27,engage the crank arm 24, as sai: 6 and member move up and dow; ring theoperation of the machine, and operate to shift the valve 3 for thepurpose of admit ting the actuating fluid alternately through theentrance ports 9 and 10.

The operation of the device here shown for purposes of illustration maybe briefly described as follows: The device 13 connected a 12 with asource of air under pressure, said air passes around the valve member11, and through the upper entrance port 9 into the cylinder 2, above thepiston head, forcing the latter downwardly. As the piston hea movesdownwardly, a rotary movement is imparted to the spiral member 7. Thevalve 7 actuating member 25 also moves downwardly with the piston headuntil the shoulder 26 thereof engages the crank arm 23 and moves it.downwardly. As the crank arm 23 moves downwardly it moves the shiftsleeve 16 until itengages the fixed collar 15. By this time the crankarm 23 is horizontaland the short crank arm 21 is in a verticalposition, or on center. The continued movement carries said short arm 21beyond center and the spring 22 comes into operation and gives a quickcontinued movement through the crank arms and the valve rod 13 to thevalve member 11. This final movement of the valve member 11 cuts oil theport 9 and brings the port 10 into communication with the space aroundthe valve member 11, or the source of the air under pressure whichoperates to move the piston upwardly again, the air above the pistonhead escaping through the port 9 and down through the hollow valve.member 11 and exhaust port 3, As the piston head and rod, together withthe valve actuating rod 25 move upwardly, the shoulder 27 on saidactuating rod engages the under side of the crank arm 23 and operates toraise the shift sleeve 16 until it en ages the nut 17. By this time theshort cran arm is again on center and the continued movement carries-itpast center in the other direction, and the spring 22 again operates toquicken the upward movement of the valve member llfiopening the port 10and bringing port '9 into communication with the source of air underpressure. This rock arm 20 with its crank arms 21 and 23, actuated bythe spring 22, and with the shift sleeve 16 with its lost motion,furnishes a very novel and successful mechanism for admitting andcutting ofl the air to and from the opposite ends of the cylinder, andthe operation is perfect. The rapid reciprocating movement of the pistonrod and head within the cylinder, over the spirally grooved member 7,imparts to the latter a rotary oscillating movement which becomesparticularly useful in grinding valve seats, or in accomplishing anyother work requiring such a movement.

Another feature of no small importance in grinding valve seats is thefact that the rapid reciprocating movement of the piston rod and head,gives just the right amount of vibration to the entire machine and tothe valve receiving the rotar oscillating movement, to permit the grining mixture, such, for example, as oil and emery, to keep the seatlubricated and supplied with the mixture.

I am notaware that any device has yet been produced in which a oweractuated reciprocating member is utilized to develop in a companionmember a rotary oscillating movement, and while I have shown anddescribed one practical embodiment of the invention, I do not intend tolimit the invention to this embodiment, for I am aware that othermechanisms can be produced which will accomplish the same result withoutdeparting from the real spirit of my invention.

I claim:

1. A valve grinder of the character referred to comprising incombination 2. casing having therein a cylinder and a valve chamber withcommunicating ports therebetween, a piston in said cylinder, a valvemember movably mounted in said valve chamber to control said ports, arotar oscil; lat-ing operating member having riving connections withsaid piston, and means for causing an accelerated movement of said valvemember in opposite directions, said means being set in operation by themove ment of said piston.

2. A valve grinder of the character referred to comprising in.combination a casing having therein a cylinder 'and a valve chamber withcommunicating ports therebetwecn, a. piston in said cylinder, a valvemember movably mount d in said valve chamber to control said P010, arotary oscillating operating member mounted in said cylinder and havingdriving connections with said piston, and a spring actuated mechanismfor accolt-rating the mo ement of said valve mem ber.

A valve grinder of the character re ferred to comprising in combinationa casing having, therein a cylinder and a valve chamber withcommunicating ports therebetivecn, a reciprocating piston in saidcylinder, a rotary oscillatmg operating member operativcly connectedwith said piston, a reciprocating valve member in said valve chamber forcontrolling said communicating ports, and operating connections betweensaid piston and said valve member for re ciprocating the latter bodilyin opposite directions.

-11. In a valve grinder of the character rel i f; I l

ferred to, in combination, a casing provided with a cylinder and avalvechamber extending longitudinally thereof with communicating portsthercbetween at their ends, apiston in said cylinder, a rotaryoscillating operating member adapted to be rotated alternately inopposite directions and having a telescopic driving connection with saidpis ton, a. valve member in said valve chamber adapted to be movedbodily therein in opposite directions for controlling the ports at theopposite ends of said valve chamber, means for connecting said valvechamber with a source of fluid under pressure, and operating connectionsfrom said piston to said valve member with a springactuated elementtherebetween for causing an accelerated movement of said valve memberwith each movement of the piston, substantially as described.

ALBURT B. COMES. Witnesses E. D. \Voonnonv, \V. A. BURKE.

